Method for extracting humus from pig manure maize straw compost

A corn stalk composting and humus technology, which is applied in fertilization devices, fertilizer mixtures, organic chemistry, etc., can solve the problems of unsatisfactory extraction effects and achieve high extraction efficiency

Inactive Publication Date: 2015-06-03
INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the unsatisfactory extraction effect of humus in pig manure and corn stalk compost in the prior art, the p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0017] Example 1

[0018] 1. Add 100mL of extraction solution to 10g of compost sample, the extraction solution is 0.1M NaOH and 0.1M Na 4 P 2 O 7 Mixed at a volume ratio of 1:1, shaken at room temperature for 2 hours, then centrifuged at 5000 rpm for 20 minutes, extracted the supernatant, and removed the filter residue.

[0019] 2. Acidify the supernatant to pH=1 with 6M hydrochloric acid, stir it thoroughly, stand still at room temperature overnight, then centrifuge at 5000 rpm for 20 minutes, collect the supernatant and the precipitate respectively, and compare the supernatant. The supernatant was freeze-dried to obtain 0.32 g of FA, and the precipitate was freeze-dried to obtain 1.14 g of HA.

Example Embodiment

[0020] Example 2

[0021] 1. Add 120mL of extract to 10g of compost sample, the extract is 0.1M NaOH and 0.1M Na 4 P 2 O 7 Mixed in a volume ratio of 1:1, shaken at room temperature for 3 hours, then centrifuged at 4000 rpm for 30 minutes, extracted the supernatant, and removed the filter residue.

[0022] 2. The supernatant was acidified with 6M hydrochloric acid to pH=1, and it was fully stirred, left at room temperature overnight, and then centrifuged at 4000 rpm for 30 minutes, and the supernatant and the precipitate were collected respectively. It was freeze-dried to obtain 0.25g FA, and the precipitate was freeze-dried to obtain 1.10g of HA.

Example Embodiment

[0023] Example 3

[0024] 1. Add 150L of extract to 10g of compost sample, the extract is 0.1M NaOH and 0.1M Na 4 P 2 O 7 Mixed at a volume ratio of 1:1, shaken at room temperature for 4 hours, then centrifuged at 6000 rpm for 15 minutes, extracted the supernatant, and removed the filter residue.

[0025] 2. Acidify the supernatant to pH=1 with 6M sulfuric acid, stir it well, stand still at room temperature overnight, and then centrifuge at 6000 rpm for 15 minutes, collect the supernatant and the precipitate, respectively, on the supernatant. The supernatant was freeze-dried to obtain 0.3 g of FA, and the precipitate was freeze-dried to obtain 1.0 g of HA.

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Abstract

The invention relates to a method for extracting humus from the pig manure maize straw compost. The method comprises the following steps: (1) adding the pig manure maize straw compost into an extracting solution, performing vibrating extraction for 2-4 hours at room temperature, centrifuging and removing the filter residue to obtain a supernate for later use, wherein the extracting solution is obtained by mixing 0.1M of NaOH and 0.1 M of Na4P2O7 according to a volume ratio of 1:1; and (2) adjusting the pH value of the supernate to 1, fully stirring, standing overnight at room temperature, centrifuging, collecting the supernate and the precipitate to respectively obtain the fulvic acid FA and the humic acid HA. The method for extracting the humus from the pig manure maize straw compost provided by the invention is high in efficiency and extraction ratio and is an effective extracting method with strong pertinency.

Description

technical field [0001] The invention relates to a method for extracting humic acid, in particular to a method for extracting humus from pig manure and corn stalk compost. Background technique [0002] Humic substances (HS) are a class of organic substances formed by chemical and biological decomposition and reaction of animal and plant residues under complex geological conditions. It is present in almost all environments such as soil, water bodies (oceans, lakes, rivers) and sediments. According to its solubility under different pH conditions, it can be divided into: humic acid, also known as humic acid (Himicadd, HA is soluble in alkali and insoluble in acid), fulvic acid (fulvicacid, FA is soluble in alkali and acid), humin (humin, Hu, insoluble in acid and alkali). [0003] Agricultural composting can be divided into two stages: activation and solidification. The first stage is intense microbial activity, and microorganisms decompose most of the degradable substances; t...

Claims

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Application Information

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IPC IPC(8): C08H99/00C07G99/00C05G3/00
Inventor 孙向平李国学肖爱平时红王熠明李扬阳
Owner INST OF BAST FIBER CROPS CHINESE ACADEMY OF AGRI SCI
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